Improved material for filling fire-proof safes



UNIT-ED STATES PATENT OFFICE.

JAMES M. BURT, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVED MATERIAL FOR FILLING FIRE-PROOF SAFES.

Specification forming part of Letters Patent No. 87,140, dated February 23, 1869.

To all whom it may concern Be it known that I, JAMES M. BURT, of the city of Philadelphia and State of Pennsylvania, have invented a new and useful Fire-Proof Compound for Safes, Trunks, or Boxes; and I do hereby declare the following to be an exact description of the same, and reference as follows:

To enable others skilled in the art to manufacture and use my invention, I state that the nature of my invention consists in the using and mixing of raw cotton with sawdust, and packing the same tightly between the sides of safes, trunks, or boxes, either in a dry or wet state, so that it fills the apertures or chambers, or whatever thing it may be applied to, so that heat cannot pass through it, and it becomes perfectly fire-proof and non-explosive.

I apply a mixture of whiting-paste around the outside of the compound of cotton and sawdust, which, as it dries, forms a shell to prevent the heat from reaching the interior of the raw cotton and sawdust.

I do not claim a paper or fibrous pulp, as claimed by William Alford in his patent of January 19, 1869; but

What I claim as my invention, and desire to secure by Letters Patent, is

The use of raw cotton, sawdust, and whiting as herein described, and for the purposes set forth.

J. M. BURT.

Witnesses:

J. FRANKLIN REIGART, FDK. WM. FARLEY. 

